We're going to turn to the health scare for hillary clinton. She suffered a concussion after fainting in her home. On the mend now, she may be out of action for most of her remaining time as secretary of state. Reena ninan has the details. Reporter: Hillary clinton has earned a new title under the obama administration. Most traveled secretary of state. But it's one she's now paying for. Clinton is recovering after affects from a mild concussion. This is the second time in eight years clinton has fainted because of a stomach bug. But in an interview with abc's barbara walters, before the concussion, clinton said that her age and health do not concern her. I'm not only healthy but have incredible stamina and energy. Reporter: According to the state department, the 65-year-old clinton became ill over last week, while suffering from a stomach virus. She became extremely dehydrated and fainted at home. That's when she sustained the concussion. Now, instead of returning to a diplomatic trip from morocco and the persian gulf, secretary clinton is under doctor's orders to rest at home. The most important thing is for her to get rest. No e-mails. No working. No stressful situations. That's the proven way to get over these symptoms. Reporter: Rest is hard for clinton. In the last four years, she's amassed more than 950,000 travel miles, while visiting 112 different countries. And as it looks more and more likely, senator john kerry, who will take over secretary of state, all of that may finally be coming to an end. For "good morning america," reena ninan, abc news, washington.

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